On Fri, 11 Apr 2025 21:28:30 GMT, Valerie Peng <[email protected]> wrote:
>> Martin Balao has updated the pull request incrementally with two additional
>> commits since the last revision:
>>
>> - Algorithm and key size checking before derivation. Mechanism
>> normalization for TLS.
>> - Minor import adjustment.
>
> src/jdk.crypto.cryptoki/share/classes/sun/security/pkcs11/P11HKDF.java line
> 246:
>
>> 244: alg.equalsIgnoreCase("Generic")) {
>> 245: return ki.keyType;
>> 246: }
>
> What is this check for? It's not immediately clear to me why do we look up
> the keyInfo using `alg` but then again to check to error out when the found
> keyType is CKK_GENERIC_SECRET && alg not equals "Generic". This seems to
> directly contradicts the special workaround for "TlsXXX" in my other PR?
For the TlsXXX issue I check the pseudo-mechanism. That works if all algorithms
are known to the map. I'll check how many we have and see what are the
pros/cons of having them in the map. I prefer symmetric key algorithms to be in
the map.
The reason for the check you referred is to block deriving keys such as
HmacSHA256, PBEWithHmacSHA224AndAES_256, etc. which are not the result of HKDF
derivations, but of Mac and PBE derivation.
-------------
PR Review Comment: https://git.openjdk.org/jdk/pull/24526#discussion_r2040428987
